3 papers
gr-qc2000
Closed Lightlike Curves in Non-linear Electrodynamics
M. Novello, V. A. De Lorenci, E. Elbaz +1
We show that non-linear electrodynamics may induce a photon to follow a closed path in spacetime. We exhibit a specific case in which such closed lightlike curve (CLC) appears
gr-qc1998
Nonlinear electrodynamics and FRW cosmology
V. A. De Lorenci, R. Klippert, M. Novello +1
Maxwell electrodynamics, considered as a source of the classical Einstein field equations, leads to the singular isotropic Friedmann solutions. We show that this singular behavior…
gr-qc1997
The Binary Pulsar Is Not the Ultimate Test for the Theory of Gravity
M. Novello, V. A. De Lorenci
General relativity can be formulated either as in its original geometrical version (Einstein, 1915) or as a field theory (Feynman, 1962). In the Feynman presentation of Einstein th…